Diagnosis of what was found in Mark's back.

This is the medical term for what was found in Mark's back...we are glad it is not cancer and this hemangioma will not cause him any problems in the future as well. Thanks again for all your thoughts and prayers.

Here’s what I found out about my situation (from Mark)

Bone hemangiomas are benign, malformed vascular lesions, overall constituting less than 1% of all primary bone neoplasms. They occur most frequently in the vertebral column (30-50%) and skull (20%), whereas involvement of other sites (including the long bones, short tubular bones, and ribs) is extremely rare.
Bone hemangiomas are usually asymptomatic lesions discovered incidentally on imaging or postmortem examination and mostly encountered in the middle-aged. The symptoms are largely nonspecific and depend on the site, size, and aggressiveness of the tumors.1, 2
Hemangiomas are slow growing, and malignant degeneration is virtually unknown. Rarely, locally aggressive growth patterns are recognized; hemangiomas with these patterns can mimic malignant lesions.